From: Andreas Kemnade <andreas@kemnade.info>
To: "Pali Rohár" <pali.rohar@gmail.com>
Cc: "H. Nikolaus Schaller" <hns@goldelico.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Andrey Gelman" <andrey.gelman@compulab.co.il>,
"Michel Verlaan" <michel.verl@gmail.com>,
"Nick Dyer" <nick@shmanahar.org>,
"Tony Lindgren" <tony@atomide.com>,
lkml <linux-kernel@vger.kernel.org>,
"Benjamin Tissoires" <benjamin.tissoires@redhat.com>,
"Pavel Machek" <pavel@ucw.cz>,
"Linux OMAP Mailing List" <linux-omap@vger.kernel.org>,
"Russell King" <linux@armlinux.org.uk>,
"Aaro Koskinen" <aaro.koskinen@nokia.com>,
"Javier Martinez Canillas" <javier@osg.samsung.com>,
"Igor Grinberg" <grinberg@compulab.co.il>,
"Hans Verkuil" <hans.verkuil@cisco.com>,
"linux-input@vger.kernel.org" <linux-input@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Eric Engestrom" <eric@engestrom.ch>,
"Hans de Goede" <hdegoede@redhat.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Mika Penttilä" <mika.penttila@nextfour.com>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Petr Cvek" <petr.cvek@tul.cz>,
"Siebren Vroegindeweij" <siebren.vroegindeweij@hotmail.com>,
"Haibo Chen" <haibo.chen@freescale.com>,
"Dmitry Torokhov" <dmitry.torokhov@gmail.com>,
"Sebastian Reichel" <sre@kernel.org>,
linux-iio@vger.kernel.org, "Andrew F. Davis" <afd@ti.com>,
"Mark Brown" <broonie@kernel.org>,
"Benoît Cousson" <bcousson@baylibre.com>,
kernel@pyra-handheld.com, "Michael Welling" <mwelling@ieee.org>,
"Discussions about the Letux Kernel"
<letux-kernel@openphoenux.org>,
"Jonathan Cameron" <jic23@kernel.org>,
"Alexander Stein" <alexander.stein@systec-electronic.com>
Subject: Re: [Letux-kernel] [PATCH v9 1/8] drivers:input:tsc2007: add new common binding names, pre-calibration, flipping and rotation
Date: Tue, 21 Feb 2017 18:07:55 +0100 [thread overview]
Message-ID: <20170221180755.48946fc5@aktux> (raw)
In-Reply-To: <20170221090940.GD9795@pali>
[-- Attachment #1: Type: text/plain, Size: 1556 bytes --]
Hi,
[...]
> > Hm. Why not touching pixel (0,0) on the touch is always pixel (0,0)
> > on the screen and touching pixel (639,479) is always (639,479)?
>
> Important is that there is no 1:1 mapping between input evdev device
> and drm/fb output device. These are two independent devices. There is
> no connection between screen and touch. So such presumption should
> not be done in kernel. You can do that in userspace.
>
But at least it can be told to userspace that these two devices are
connected. That information should be specified in devicetree because
it is not auto-detectable.
> Lets take e.g. touchpad. It acts similarly as touchscreen input device
> (both reports absolute positioned touch events), but touchpad is not
> connected with screen. And from kernel point of view these devices are
> both input and absolute positioned.
>
> It looks like the whole problem is there that you wanted to do this
> mapping for your hardware in kernel. And this is not what is kernel
> doing or should do. Moreover I know people who are using integrated
> touchscreen on laptop as (touch) input device for external monitor.
> And in this configuration it does not make any sense to map
> touchscreen input to pixels of integrated LCD touchscreen (as
> external monitor could have different resolution as integrated LCD
> touchcreen).
>
Interesting example. But then you also do not need flipping/rotation
because the angle between your screen and your absolute position device
is not fixed.
Regards,
Andreas
>
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
next prev parent reply other threads:[~2017-02-21 17:10 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-28 14:53 [PATCH v9 0/8] drivers: touchscreen: tsc2007 and ads7846/tsc2046 improvements (use common touchscreen bindings, pre-calibration, spi fix and provide iio raw values) H. Nikolaus Schaller
2016-12-28 14:53 ` [PATCH v9 1/8] drivers:input:tsc2007: add new common binding names, pre-calibration, flipping and rotation H. Nikolaus Schaller
2017-01-09 17:43 ` Rob Herring
2017-01-28 19:33 ` Dmitry Torokhov
2017-01-28 21:44 ` H. Nikolaus Schaller
2017-02-17 20:40 ` Dmitry Torokhov
2017-02-18 3:22 ` Sebastian Reichel
2017-02-18 11:33 ` H. Nikolaus Schaller
2017-02-18 23:44 ` Sebastian Reichel
2017-02-19 12:07 ` H. Nikolaus Schaller
2017-02-19 20:15 ` Sebastian Reichel
2017-02-20 16:49 ` H. Nikolaus Schaller
2017-02-18 7:45 ` [Letux-kernel] " Andreas Kemnade
2017-02-18 9:15 ` Pavel Machek
2017-02-18 11:33 ` H. Nikolaus Schaller
2017-02-18 18:08 ` Pavel Machek
2017-02-18 19:17 ` H. Nikolaus Schaller
2017-02-18 22:54 ` Pavel Machek
2017-02-19 12:05 ` H. Nikolaus Schaller
2017-02-19 14:17 ` Pavel Machek
2017-02-19 17:04 ` H. Nikolaus Schaller
2017-02-19 17:15 ` Pavel Machek
2017-02-19 17:51 ` H. Nikolaus Schaller
2017-02-19 19:05 ` Pavel Machek
2017-02-19 19:31 ` H. Nikolaus Schaller
2017-02-19 20:57 ` Pavel Machek
2017-02-19 22:01 ` H. Nikolaus Schaller
2017-02-19 22:19 ` Pavel Machek
2017-02-20 16:50 ` H. Nikolaus Schaller
2017-02-20 19:29 ` Pavel Machek
2017-02-20 20:20 ` H. Nikolaus Schaller
2017-02-20 22:26 ` Petr Cvek
2017-02-21 8:29 ` H. Nikolaus Schaller
2017-02-19 22:29 ` [Letux-kernel] " Andreas Kemnade
2017-02-19 22:39 ` Pavel Machek
2017-02-20 16:50 ` H. Nikolaus Schaller
2017-02-20 19:32 ` Pavel Machek
2017-02-20 20:22 ` H. Nikolaus Schaller
2017-02-20 20:50 ` H. Nikolaus Schaller
2017-02-18 11:32 ` H. Nikolaus Schaller
2017-02-20 1:07 ` Dmitry Torokhov
2017-02-20 16:50 ` H. Nikolaus Schaller
2017-02-20 19:42 ` Pali Rohár
2017-02-20 20:35 ` H. Nikolaus Schaller
2017-02-20 21:07 ` Pali Rohár
2017-02-20 21:24 ` H. Nikolaus Schaller
2017-02-20 21:54 ` Pali Rohár
2017-02-21 6:42 ` H. Nikolaus Schaller
2017-02-21 8:53 ` Pali Rohár
2017-02-20 21:08 ` Pali Rohár
2017-02-20 21:27 ` H. Nikolaus Schaller
2017-02-20 21:50 ` Dmitry Torokhov
2017-02-20 22:21 ` Petr Cvek
2017-02-20 22:24 ` Dmitry Torokhov
2017-02-21 6:56 ` H. Nikolaus Schaller
2017-02-20 22:45 ` Pali Rohár
2017-02-21 6:36 ` H. Nikolaus Schaller
2017-02-21 9:09 ` Pali Rohár
2017-02-21 17:07 ` Andreas Kemnade [this message]
2017-02-20 22:04 ` Pali Rohár
2017-02-21 6:49 ` H. Nikolaus Schaller
2017-02-21 7:14 ` H. Nikolaus Schaller
2017-02-21 8:47 ` Pali Rohár
2017-02-21 8:57 ` [Letux-kernel] " Christ van Willegen
2017-02-21 11:07 ` Pavel Machek
2016-12-28 14:53 ` [PATCH v9 2/8] drivers:input:tsc2007: check for presence and power down tsc2007 during probe H. Nikolaus Schaller
2017-02-17 20:52 ` Dmitry Torokhov
2016-12-28 14:53 ` [PATCH v9 3/8] DT:omap3+tsc2007: use new common touchscreen bindings H. Nikolaus Schaller
2016-12-28 14:53 ` [PATCH v9 4/8] drivers:input:ads7846(+tsc2046): add new common binding names, pre-calibration and flipping H. Nikolaus Schaller
2016-12-28 14:53 ` [PATCH v9 5/8] dt-bindings: input: move ads7846 bindings to touchscreen subdirectory H. Nikolaus Schaller
2017-02-23 9:54 ` H. Nikolaus Schaller
2016-12-28 14:53 ` [PATCH v9 6/8] drivers:input:ads7846(+tsc2046): fix spi module table H. Nikolaus Schaller
2017-01-28 19:35 ` Dmitry Torokhov
2017-01-29 8:39 ` H. Nikolaus Schaller
2017-01-29 18:01 ` Dmitry Torokhov
2017-01-29 18:25 ` H. Nikolaus Schaller
2017-02-01 20:20 ` H. Nikolaus Schaller
2017-02-01 21:14 ` Javier Martinez Canillas
2017-02-01 22:28 ` Dmitry Torokhov
2017-02-01 22:50 ` Javier Martinez Canillas
2017-02-02 5:47 ` H. Nikolaus Schaller
2016-12-28 14:53 ` [PATCH v9 7/8] DT:omap3+ads7846: use new common touchscreen bindings H. Nikolaus Schaller
2016-12-28 14:53 ` [PATCH v9 8/8] drivers:input:tsc2007: add iio interface to read external ADC input and temperature H. Nikolaus Schaller
2016-12-30 20:36 ` Jonathan Cameron
2017-02-17 21:27 ` Dmitry Torokhov
2017-02-18 11:35 ` H. Nikolaus Schaller
2017-01-16 6:34 ` [PATCH v9 0/8] drivers: touchscreen: tsc2007 and ads7846/tsc2046 improvements (use common touchscreen bindings, pre-calibration, spi fix and provide iio raw values) H. Nikolaus Schaller
2017-01-21 13:08 ` Jonathan Cameron
2017-01-21 13:17 ` H. Nikolaus Schaller
2017-01-28 18:16 ` [Letux-kernel] " H. Nikolaus Schaller
2017-02-12 15:18 ` H. Nikolaus Schaller
2017-02-15 14:03 ` H. Nikolaus Schaller
2017-02-17 20:43 ` Dmitry Torokhov
2017-02-18 11:30 ` H. Nikolaus Schaller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170221180755.48946fc5@aktux \
--to=andreas@kemnade.info \
--cc=aaro.koskinen@nokia.com \
--cc=afd@ti.com \
--cc=alexander.stein@systec-electronic.com \
--cc=andrey.gelman@compulab.co.il \
--cc=arnd@arndb.de \
--cc=bcousson@baylibre.com \
--cc=benjamin.tissoires@redhat.com \
--cc=broonie@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=dmitry.torokhov@gmail.com \
--cc=eric@engestrom.ch \
--cc=grinberg@compulab.co.il \
--cc=haibo.chen@freescale.com \
--cc=hans.verkuil@cisco.com \
--cc=hdegoede@redhat.com \
--cc=hns@goldelico.com \
--cc=javier@osg.samsung.com \
--cc=jic23@kernel.org \
--cc=kernel@pyra-handheld.com \
--cc=letux-kernel@openphoenux.org \
--cc=linux-iio@vger.kernel.org \
--cc=linux-input@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-omap@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mark.rutland@arm.com \
--cc=mchehab@kernel.org \
--cc=michel.verl@gmail.com \
--cc=mika.penttila@nextfour.com \
--cc=mwelling@ieee.org \
--cc=nick@shmanahar.org \
--cc=pali.rohar@gmail.com \
--cc=pavel@ucw.cz \
--cc=petr.cvek@tul.cz \
--cc=robh+dt@kernel.org \
--cc=siebren.vroegindeweij@hotmail.com \
--cc=sre@kernel.org \
--cc=tony@atomide.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).